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Old 04-17-2019, 08:34 PM   #12
First c10
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Join Date: Dec 2012
Location: Los Banos CA
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Re: Brake switch for Gen IV LMG 5.3

Quote:
Originally Posted by sprint_9 View Post
This is incorrect.

You need to run everything on the Normally Open side of the switch, so you only get 12v when the brake is pressed.

I assume in your picture that the light blue wire by itself is the one going to the ecm, if so that needs to get tied into the other wires on the other side of the switch.
I agree but when scanning the brake pedal applied yes or no
Wired this way in the picture scans correctly.
That’s the reason for my posts.
I am going to check it with the brake lights actually installed down the road.
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